socket-ServerSocket例子

import javax.swing.*; import java.awt.*; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; import java.net.*; import java.io.*; public class ClientFrame extends JFrame implements ActionListener{ JTextField userName; JPasswordField userPwd; JLabel lqq, lpwd; JButton login, cancle; JPanel p1, p2, p3; ImageIcon image; /*界面中的问题1：图片的正常显示问题 问题2：组件的大小设置问题*/ public ClientFrame() { userName = new JTextField(20); userPwd = new JPasswordField(); lqq = new JLabel("QQ号码"); lpwd = new JLabel("QQ密码"); p2 = new JPanel(); p2.setLayout(new GridLayout(2, 1)); p2.add(lqq); p2.add(userName); p2.add(lpwd); p2.add(userPwd); //设置p2的边框 p2.setBorder(BorderFactory.createTitledBorder("登录信息")); login = new JButton("登录"); cancle = new JButton("取消"); login.addActionListener(this); cancle.addActionListener(this); p1 = new JPanel(); //修改图片路径 image = new ImageIcon("E://workspace/Demo/qqImage/gg.jpg"); JLabel l1 = new JLabel(image); p1.add(login); p1.add(cancle); //p1.add(l1); Container cn = this.getContentPane(); //cn.setLayout(new GridLayout(3,1)); cn.add(l1, BorderLayout.NORTH); cn.add(p2, BorderLayout.CENTER); cn.add(p1, BorderLayout.SOUTH); this.setSize(400, 300); this.setVisible(true); this.setTitle("Java版QQ"); } public static void main(String[] args) { ClientFrame qqLogin = new ClientFrame(); /* 改变界面外观 try{ UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); SwingUtilities.updateComponentTreeUI(qqLogin); }catch(Exception e){}*/ } public void actionPerformed(ActionEvent e) { //连接服务器 Socket socket=new Socket("localhost",9999); //发送到服务器 String user=userName.getText(); String pwd=userPwd.getText(); OutputStream os=socket.getOutputStream(); PrintWriter pw=new PrintWriter(os,true); pw.println(user); pw.println(pwd); //从服务器得到反馈信息 //根据信息采取相关操作 try { if (e.getSource() == login) { //登录处理 Socket s = new Socket("127.0.0.1", 2020); //提取用户名，密码 String name=userName.getText().trim(); String pwd=userPwd.getText().trim(); //以数据流的形式发往服务器，进行验证 OutputStream os=s.getOutputStream(); OutputStreamWriter osw=new OutputStreamWriter(os); //PrintWriter和PrintStream类的作用是提供一组重载的print和println //方法,用于把各种类型的数据转换为字符串形式输出,输出到与其相连的数据介质上 PrintWriter pw=new PrintWriter(osw,true); //用户名密码写入输出流 pw.println(name+"--&&--"+pwd); //分析从服务器段发送来的输入流，得出用户是否合法的相应操作 InputStream is=s.getInputStream(); InputStreamReader isr=new InputStreamReader(is); BufferedReader br=new BufferedReader(isr); String result=br.readLine(); if(result.equals("ok")){ this.setVisible(false); //JOptionPane.showMessageDialog(this,"欢迎你登录！"); new UserList(); } else{ JOptionPane.showMessageDialog(this,"密码错误！"); } } else if (e.getSource() == cancle) { userName.setText(""); userPwd.setText(""); } } catch (Exception ee) {} } }